Heat of Neutralization. Objective: To investigate the enthalpy changes () of various acid-base neutralizations.

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Title: Heat of Neutralization

Objective: To investigate the enthalpy changes () of various acid-base neutralizations.

Chemicals and Apparatus:

1.0M hydrochloric acid, ~1.0M sodium hydroxide solution, one thermometer, one polystyrene foam cup with lid, two pieces of 50.00 burette, two filter funnels, one piece of 25.00 pipette, pipette filler and a 100 beaker.

Background:

All chemical reactions involve energy changes. The study of energy changes is an important part of chemistry. Fundamental to the thermo-chemistry is the law of conservation of energy, which states that energy is neither created nor destroyed, but can be converted from one form to another. An exothermic reaction is one in which stored chemical energy is converted to heat energy (heat is released to the surroundings), conversely an endothermic reaction is one in which heat energy is converted to chemical energy (heat is absorbed into the system). The enthalpy (H) of a substance, sometimes called its heat content, is an indication of its total energy content. The equation for calculating the enthalpy change (heat change) is given by

?H = -m x c x ?T

where m is the mass of the sample, c is the specific heat